Steam-jet apparatus.



A. MIERSBB.

STEAM JET APPARATUS. APPLIOATION FILED AUG. 2s, 191s.

1,095,91 0. Patented May 5, 1914.

- apparatus,

mussen, or condens, erinnern.

STEAM-mfr arraraafrus.

specification of Letters Patent.

Patented May 5, 1914,

Application alsa August as, 191s. seri-a1 No. 187,116.

To all whom it may concern:

Be it known that I, ADOLF Mrnnsn, a subject of the Kingof Prussia, German Emperor, residing at Cologne, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Steam-Jet Apparatus, of wh1ch the following is a specification..

This invention relates` to ai steam jet apparatus the nozzle of which is constructed in such a manner that it can be removed or adjusted during the working o f the apparatus. The lapparatus has further a central admission of air and it can be mounted 1n steam heating plants so that the steam which circulates in the plant returns to the the eliiciency of. the. heating plant being thus considerably increased.

The -characteristic feature of the invention consists 1n the adjustability and interchangeability of the nozzle core during the working; A nozzle with invariable cross section will naturally fail when the admission of fresh steam varies, as is for example the, case with sudden differences of temperature, each nozzle section requiring a determined quantity of steam for its proper working. For this reason it is very 1mportant that the cross section of the nozzle can be 'regulated in order to insure a proper and continuous worki of the steam jet apparatus. If the quantities of fresh steam admitted vary considerably it is not Sulli- Icient that the cross section' of the nozzle can be regulated but the nozzle must be removable or interchangeable.

As steam jet apparatuses are used only for large heating plants theA stopping of the plantl requires much time and causes a certain loss of power which is avoided by the improved nozzle. The invention is particularly useful where heating-plants are used for mechanically drying materials as in such cases the shutting oil of the steam would be particularly onerous. Y

When heating plants with steam jet apparatus are bein mixed with the esh steam for reducing the tension of the steam and consequently increasing the volume of the same. Wi the apparatuses of known construction the air inlets are arranged in such a manner that the steam jet apparatus draws in the air only if the cross sections of the air inlets are vof determined proportion with r ards to Mthe cross sections ef the ports for t e steam started air is generally ad- Which is fura-wn A'and with the .quantity of i the active fresh steam.. This arrangement 1s 'not practicable ,with heating plants so that this admission of air is generally not proper y the air inlet is arranged in the core of the nozzle and consequently surrounded by fresh steam so that the sucklng in of the air is insured.

In the accompanying drawings the inven; tion is shown by way of example.-

Figure 1 shows the nozzle core in working position the register being lifted. Fig. 2 shows the nozzle core withdrawn into the fore-chamber which is shut off from the nozzle chamber proper bythe register.

The fresh steam flows in the direction of the arrows from the inlet 1 through the nozzle to the outlet 2; the return steam iow's in at 3 and flows out through the out-4 let 2. The nozzle core 4 is screwed upon a hollow spindle 10 the rear end of which is screwed into the casing and adapted to be screwed in or out by means of a hand wheel 5. If the regulation of the nozzle by means of the hand wheel 5 is not sufficient the nozzle core 4 must be removed and a nozzle core of a different shape inserted which of .course is possible only if the nozzle core has been removed froml the apparatus. With this object in view the re ister 7 is arranged in such a manner that 1t drops automatically as soon as the nozzle core 4 has been suiiiciently moved back, whereby the steam apparatus is shut 0H. The fore-chamber 8 is packed by means of a stuffing box 9. Only vafter the register 7 has dropped air can get into the fore-chamber 8 owing to the special shape of the nozzle core 4 so that, if the nozzle core has been sufhciently withdrawn the steam in the fore-chamber expands andl the nozzle' can be removed. Thev fresh steam flowing in through the inlet 1 surrounds the nozzle 4 whereby a partial vacuum is produced at the front end of theA central channel of the nozzle core andair 1s drawn in through the spring influenced air valvev 11 arranged at the end of the central bore of the spindle 10. The iniow of the air is stopped if the pressure in the heating plant has increased so that the valve 11 is automatically closed.

Steam jet apparatus comprising in combination with the casing having inlets for the trash steam and for the return steam and an outlet for the heating steam, e fore-chember at the rear end of the casing, e register adapted to shut oll'1 said fore-chamber from said casing' a nozzle in said casing,l a movable nozzle core in said nozzle, a, hollow screw spindle into the front end of which said removable nozzle core is screwed, an outwardly threaded rear part of said spindle guided in a correspondingly threaded part 10 of the casing, a hand Wheel upon the rear Witnesses vCopies of this patent may be obtained for ve cents each, by eddressi Washington, D. E.

end of seid spindle, and a srng inuenced Valve closing` the rear end o spindle, substantially as described and the bore of the the purpose set forth.

In Witness whereof I have hereunto set my hand in the presence of two Witnesses.

ADOLF MIERSBE.

OSCAR DEPNEB, HANS DERMONT.

ng the Commissioner of Patents, 

